WO2011023064A1

WO2011023064A1 - Network selection method and device based on shared network

Info

Publication number: WO2011023064A1
Application number: PCT/CN2010/075864
Authority: WO
Inventors: 何毅
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-08-24
Filing date: 2010-08-10
Publication date: 2011-03-03
Also published as: CN101646226B; CN101646226A

Abstract

A network selection method and device based on shared network are provided by the present invention, wherein said method includes the following steps: after a Mobile Station (MS) fails to register to a first Public Land Mobile Network (PLMN), whether a first PLMN set exists or not is searched in a first selection level to which the first PLMN belongs, wherein, the first PLMN set comprises one or a plurality of PLMNs located in the same shared cell with the first PLMN; if the first PLMN set is found, then a PLMN is selected from the first PLMN set for registration. Thus, during the selection for PLMN, the shared information can be used to preferentially select other PLMNs belonging to the same shared cell for registration without re-residence, so that the network selection flow is simplified and the registration efficiency can be improved.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a network selection method and apparatus based on a shared network. BACKGROUND OF THE INVENTION In order to effectively utilize resources and save operating costs, multiple operators may share the same access network. For example, China is now advocating that multiple mobile operators share the same radio resource system as much as possible. Therefore, the same cell can belong to multiple operators, and such a cell is simply referred to as a shared cell, and such a network is called a shared network. When the mobile terminal searches for or camps on a certain cell, if it is a shared cell, the mobile terminal can utilize the information of multiple operators provided by the shared cell to optimize the PLMN selection and registration process. According to the PLMN (Public Land Mobile Network) selection specification (see 3GPP (Third Generation Partnership Project) TS (Technical Specification) 23.122), MS (Mobile Station, The NAS (Non-Access Stratum) layer of the mobile station selects a PLMN to camp from the list of available PLMNs reported by the AS (Access Stratum). If the camp is successful, the resident cell The registration process is initiated. Among them, the strategy for PLMN selection is: In the mode of automatically selecting PLMN, there are RPLMN (Registered PLMN, Registered PLMN) or ERPLMN (EQUALENT RPLMN, equivalent RPLMN), and select one of RPLMN or ERPLMN. The item is registered; if there is no RPLMN or ERPLMN, the user searches for available PLMNs and performs PLMN selection in the following order of priority:

1) HPLMN (Home PLMN, Home PLMN) (if there is no EHPLMN (EQUALENT HPLMN) list) or highest priority EHPLMN (if EHPLMN list exists); 2) User preference list in order of priority;

3) a list of operator preferences in order of priority;

4) a list of high quality PLMNs arranged randomly; 5) List of other PLMNs arranged by signal quality. The first three lists are in the SIM (Subscriber Identity Module) card. When selecting the network, the MS selects a PLMN and first camps. If the resident is successful, it registers on the resident PLMN. Registration failed, and the reason for the failure is #11 (PLMN not allowed, PLMN is not supported), # 13 (Roaming not allowed in this location area, roaming is not provided in this location area i or), # 14 (GPRS services not allowed in this PLMN, which does not provide GPRS service in the PLMN, the NAS will select the next PLMN and re-resident. If the relocation is successful, it will re-register on the newly selected PLMN. It can be seen from the above process that the shared cell information is not used in the PLMN selection process, so it is necessary to re-resident when selecting a new PLMN, thereby complicating the network selection process and reducing the registration efficiency. The selection of the network in the related technology will complicate the network selection process and reduce the registration efficiency. At present, no effective solution has been proposed. SUMMARY OF THE INVENTION The present invention is directed to a network selection method in the related art, which complicates the network selection process and reduces the registration efficiency. To this end, the main purpose of the present invention is to provide a network selection method and apparatus based on a shared network. To solve at least one of the above problems. In order to achieve the above object, according to an aspect of the present invention, a network selection method based on a shared network is provided. The method for selecting a network based on the shared network according to the present invention includes: after the failure of the mobile terminal MS to register with the first public land mobile network PLMN, searching for a first PLMN set in the first selection level to which the first PLMN belongs, where The first PLMN set includes: one or more PLMNs located in the same shared cell as the first PLMN; if the first PLMN set is found, one PLMN is selected from the first PLMN set for registration. In order to achieve the above object, according to another aspect of the present invention, a network selection device based on a shared network is provided. The network-based network selection device according to the present invention includes: a lookup module, configured to belong to the first PLMN after the mobile terminal MS fails to register with the first public land mobile network PLMN Determining whether there is a first PLMN set in the first selection level, where the first PLMN set includes: one or more PLMNs located in the same shared cell as the first PLMN; and a selecting module, configured to find the first PLMN set In the case of the case, a PLMN is selected from the first PLMN set for registration. According to the present invention, when the MS searches for the available PLMN list, if it is a PLMN belonging to the same shared cell, the sharing information of the PLMN is saved, so that when the PLMN is selected, the shared information can be utilized, and the sharing is the same as the priority. The other PLMNs in the zone are registered without re-resident, which simplifies the network selection process and improves registration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a flowchart of a network selection method based on a shared network according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a network selection method based on a shared network according to an embodiment of the present invention; FIG. 4 is a schematic diagram showing an arrangement order of PLMNs according to an embodiment of the present invention; FIG. 5 is a structural diagram of a network selection apparatus based on a shared network according to an embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. Considering that the network selection method in the related art may complicate the network selection process and reduce the registration efficiency, the present invention provides a network selection method and apparatus based on a shared network. According to the present invention, when the list of available PLMNs searched on the AS is a PLMN belonging to the same shared cell, the information is shared at the same time as the upper 4 艮 PLMN, so that when the PLMN is selected, the PLMN can be utilized. The shared cell information is preferentially selected by other PLMNs sharing the same 'j, zone', and does not need to be re-resident, thereby simplifying the network selection process and improving the registration efficiency. According to the present invention, a network selection method based on a shared network is provided. 1 is a flow chart of a method for selecting a network based on a shared network in accordance with the present invention. After the mobile terminal MS fails to register with the first public land mobile network (PLMN), the network selection method based on the shared network mainly includes the following steps: step S102 to step 4, S: 104, as shown in FIG. 1: Step S102 Finding whether there is a first in the first selection level to which the first PLMN belongs

a PLMN set, where the first PLMN set comprises: one or more PLMNs located in the same shared cell as the first PLMN. Step S104: If the first PLMN set is found, select one PLMN from the first PLMN set to register. If the first PLMN set is not found, the network selection method based on the shared network further includes: Step S106, searching for a second PLMN set in the second selection level, where the second selection level is lower than the first A selection level, the second PLMN set includes: one or more PLMNs located in the same shared cell as the first PLMN. Step S108: If the second PLMN set is found, select one PLMN from the second PLMN set to register. The implementation process of the embodiment of the present invention will be described in detail below with reference to examples. 2 is a schematic diagram of a network selection method based on a shared network according to an embodiment of the present invention. As shown in FIG. 2, the above network selection method mainly includes the following steps S202 to S216: Step S202: The AS of the MS searches for an available PLMN. If there are multiple PLMNs in the same shared cell, the AS carries the messages of the shared information of the PLMNs when the upper list of available PLMNs is used. As shown in FIG. 2, when the available PLMNs are searched on the AS, four PLMN messages can be sent, where the PLMN messages carry the information as shown in Table 1. If the PLMN is a PLMN located in a shared cell, the AS also needs to share information of the PLMN. For example, in the shared information of the PLMN, the sharePLMN indicates whether the PLMN is a PLMN located in the shared cell, and shareNu indicates a mapping relationship between the PLMN and the shared cell to which the PLMN belongs, that is, which shared cell the PLMN is located, where is the rat indication RAT (Radio Access Technology, wireless connection) The PLMN searched under the technology, that is, the searched PLMN is limited by which system. Here, the MS saves the shared information of the above PLMN. Table 1

Step S204: Arranging the searched PLMNs to form a PLMN list selectable by the user. Optionally, the searched PLMNs may be arranged according to the following steps: Step S2042: All available PLMNs are first arranged according to the order of the PLMN selection levels; Step S2044, according to the priorities of the PLMNs, belong to the same The PLMN in one selection level performs the second time ·φφ column; in step S2046, the PLMN in the same selection level after the second arrangement is arranged for the third time according to whether the PLMN is located in the same shared cell. Here, the third arrangement described above refers to: First, immediately adjacent one or more PLMNs located in the same shared cell, one or more PLMNs constitute a PLMN subset; and then, the PLMN in the PLMN subset is the highest. The priority is used as the priority of the PLMN sub-set, and the PLMN sub-sets and/or PLMNs not located in the same shared cell are arranged in order of priority. As shown in FIG. 2 and FIG. 3, the list of available PLMNs on the AS includes 4 sP1, sP2, sP3, and PI. In terms of the shared cell, the above sP1, sP2, and sP3 are located in the same shared cell; in terms of the selection level of the PLMN, sP1, sP2, and PI belong to the first selection level, for example, belong to the operator preferred list, and sP3 belongs to the The second selection level, wherein the first selection level is higher than the second selection level; in terms of the priority of the PLMN, the priorities of sPl, Pl, sP2, and sP3 are sequentially lowered. As shown in FIG. 3, according to the prior art PLMN arrangement method, the order of 4 columns of sPl, sP2, sP3, and PI is: sPl, PI, sP2, sP3. According to the embodiment of the present invention, first, a total of 4 PLMNs of sP1, sP2, sP3, and PI are arranged in the first order according to the order of selection, and then belong to the same selection level according to the priority order of the PLMN. The PLMN performs the second alignment. Since sP1, sP2, and PI belong to the first selection level, and sP3 belongs to the second selection level, and the priorities of sP1, P1, sP2, and sP3 are sequentially descended, if the order of priority and priority are in descending order, You can get the following four column order: sPl , PI , sP2, sP3. Secondly, the PLMNs in the same selection level after the second arrangement are arranged for the third time according to whether the PLMNs are located in the same shared cell. Since sPl and sP2 are located in the same shared cell, sP1 and sP2 are arranged next in the arrangement of "sPl, PI, sP2", and sPl and sP2 are regarded as PLMN sub-sets. Since the priority of sP1 is higher than sP2, the priority of sP1 is regarded as the priority of the above-mentioned PLMN sub-set for subsequent arrangement. Then, the PLMN sub-set and P1 are arranged according to the priority of the PLMN. Since the priority of P1 is lower than the priority of the PLMN sub-set, the following order may be obtained: sPl, sP2, PI, sP3, as shown in the figure 4, and the above four PLMNs are stored in the PLMN list in this order. Step S206, the camping is performed on the selected PLMN, and if the camping is successful, the process goes to step S208. Preferably, the PLMN with the highest priority is selected to camp, for example, selecting the highest priority sP1 in the PLMN list to camp. Step S208, registering on the selected PLMN. For example, the registration step S210 is performed on the selected sP1, the network side rejects the registration request, and the registration fails, and returns the following rejected reasons: #11 (PLMN not allowed), # 13 (Roaming not allowed in this location area) Step 14: According to the specification, if there is still a PLMN available, the MS should reselect the PLMN. When selecting a new PLMN, the PLMN list formed above may be in the following order. In step S2122, it is found in the first selection level to which sP1 belongs, whether there is such a PLMN set, that is, the PLMN set includes: one or more PLMNs located in the same shared cell as sP1. For the PLMN set, select one of the above PLMN sets. The PLMN registers, and proceeds to step S208. If the above PLMN set does not exist, then go to step 4 to gather S2124. In this embodiment, since there is still sP2 located in the same shared cell as sP1 in the first selection level, the MS selects sP2 to re-register. Since sPl and sP2 belong to a shared cell, when sP2 is selected for registration, there is no need to re-resident, and registration can be directly performed, which simplifies the network selection process and improves registration efficiency. Step S2124: Searching, in the second selection level, whether there is such a PLMN set, that is, the PLMN set includes: one or more PLMNs located in the same shared cell as sP1, where the second selection level is lower than the first selection. grade. If the above-mentioned PLMN set exists, one PLMN is selected from the above-mentioned PLMN set for registration, and the process goes to step S208, where preferably, the PLMN having the highest priority is selected to camp. If the above PLMN set does not exist, then go to step 4 to gather S214. Step 214: Select a PLMN that does not belong to the shared cell in the formed PLMN list to register, and go to step 4 to gather S206. Here, a PLMN that does not belong to the shared cell may be selected in the formed PLMN list according to a selection manner in the prior art, for example, another PLMN (for example, P1) that belongs to the first selection level in the same manner as sP1 is selected, where The other PLMN is not located in the same shared cell as sP1. In summary, according to the foregoing embodiment of the present invention, when the MS searches for an available PLMN list, if it is a PLMN belonging to the same shared cell, the shared information of the PLMN is saved, so that when the PLMN is selected, the shared information can be utilized. It is preferred to register other PLMNs that share the same j, zone, and do not need to re-resident, thereby simplifying the network selection process and improving the registration efficiency. The present invention has a promotion value for the case where the domestic and foreign mobile terminals are in the same network in which multiple PLMNs share the same network. According to an embodiment of the present invention, a network selection device based on a shared network is provided. Figure 5 is a block diagram of a network selection device based on a shared network in accordance with the present invention. As shown in FIG. 5, the apparatus includes: a searching module 504, configured to be connected to the storage module 508, configured to search for a first selection level to which the first PLMN belongs after the mobile terminal MS fails to register with the first public land mobile network PLMN. Whether there is a first PLMN set, where the first PLMN set includes: one or more PLMNs located in the same shared cell as the first PLMN; and a selecting module 502, connected to the searching module 504, for finding the first PLMN Set of cases from the first PLMN set Select a PLMN to register. Preferably, the searching module 504 is further configured to: in the second selection level, if there is no first PLMN set found, whether there is a second PLMN set, wherein the second selection level is lower than the first selection level, and the second The PLMN set includes: one or more PLMNs located in the same shared cell as the first PLMN; in the above case, the selecting module 502 is further configured to select one of the second PLMN sets if the second PLMN set is found. PLMN is registered. The apparatus further includes: a search module 506, configured to search for available PLMNs before the mobile terminal MS registers with the first public land mobile network PLMN; a storage module 508 coupled to the search module 506 and the lookup module 504 for searching The sharing information of the PLMN is saved when the PLMN is located in the shared cell, where the shared information includes at least: a mapping relationship between the PLMN and the shared cell to which the PLMN belongs. After the mobile terminal MS fails to register with the first public land mobile network PLMN, the searching module 504 searches for the presence of the first PLMN set described above in the first selection level to which the first PLMN belongs. If the first PLMN set is found, the lookup module 504 sends a message to the selection module 502 to select a PLMN from the first set of PLMNs for registration. If the first PLMN set is not found, the lookup module 504 searches for the presence of the second PLMN set described above in the second selection level. If a second PLMN set is found, the lookup module 504 sends a message to the selection module 502 to select a PLMN from the second set of PLMNs for registration. Preferably, the apparatus further includes: an arranging module (not shown) connected to the storage module 508 for arranging the available PLMNs. Preferably, the arranging module can perform 4 columns of available PLMNs according to the following steps:

1) performing the first column of all available PLMNs in the order of the PLMN selection level;

2) performing a second _ queue for the PLMNs belonging to the same selection level in the order of priority of the PLMN;

3) Perform a third arrangement of the PLMNs within the same selection level after the second arrangement according to whether the PLMNs are located in the same shared cell. Preferably, the foregoing third ordering comprises: immediately following one or more PLMNs arranged in the same shared cell, the one or more PLMNs forming a PLMN subset; and the PLMN The highest priority of the PLMN in the subset is used as the priority of the PLMN subset, and the PLMN subset and/or the PLMN not located in the same shared cell are arranged in order of priority. For an example of the above three times, refer to the description in the above method embodiment (as shown in FIG. 2-4), which is not mentioned here. According to the present invention, when the PLMN is selected, the PLMN sharing information can be used to preferentially select other PLMNs belonging to the same 'j, zone to register without re-resident, thereby simplifying the network selection process and improving the registration efficiency. It should be noted that the steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and, although the logical order is shown in the flowchart, in some cases, The steps shown or described may be performed in an order different than that herein. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A network selection method based on a shared network, characterized in that after the mobile terminal MS fails to register with the first public land mobile network PLMN, the method includes:

Querying, in the first selection level to which the first PLMN belongs, whether there is a first PLMN set, where the first PLMN set includes: one or more PLMNs that are located in the same shared cell as the first PLMN;

If the first PLMN set is found, a PLMN is selected from the first set of PLMNs for registration.

2. The method according to claim 1, wherein selecting one PLMN from the first set of PLMNs for registration comprises:

A PLMN with the highest priority is selected from the first set of PLMNs for registration.

The method according to claim 1, wherein if the first set of PLMNs is not found, the method further includes:

Querying, in the second selection level, whether there is a second PLMN set, where the second selection level is lower than the first selection level, and the second PLMN set includes: being located in the same shared cell as the first PLMN One or more PLMNs within;

If the second PLMN set is found, a PLMN is selected from the second PLMN set for registration.

4. The method according to claim 3, wherein selecting one PLMN from the second set of PLMNs for registration comprises:

A PLMN with the highest priority is selected from the second set of PLMNs for registration.

The method according to any one of claims 1 to 4, wherein, before the MS registers with the first PLMN, the method further includes:

Searching for an available PLMN, if the searched PLMN is located in the shared cell, the sharing information of the PLMN is saved, where the shared information includes at least: a mapping relationship between the PLMN and the shared cell to which the PLMN belongs. The method according to claim 5, wherein after the searching for available PLMNs, the method further comprises:

All available PLMNs are first arranged in the order of the PLMN's selection level;

Performing a second _ queue for PLMNs belonging to the same selection level in the order of priority of the PLMN;

The PLMNs in the same selection level after the second arrangement are arranged a third time according to whether the PLMNs are located in the same shared cell. The method according to claim 6, wherein the third arrangement comprises:

Immediately adjacent to one or more PLMNs located in the same shared cell, the one or more PLMNs constitute a PLMN subset;

The highest priority of the PLMN in the PLMN subset is used as the priority of the PLMN subset, and the PLMN subset and/or the PLMN not located in the same shared cell are arranged in order of priority. A network selection device based on a shared network, wherein the device comprises:

a locating module, configured to search for a first PLMN set in a first selection level to which the first PLMN belongs after the mobile terminal MS fails to register with the first public land mobile network PLMN, where the first PLMN set exists The method includes: one or more PLMNs located in the same shared cell as the first PLMN;

And a selecting module, configured to select, by using the first PLMN set, a PLMN to register when the first PLMN set is found. The device according to claim 8, wherein

The searching module is further configured to: in the second selection level, if there is no first PLMN set found, to find whether there is a second PLMN set, where the second selection level is lower than the first selection Level, the second PLMN set includes: one or more PLMNs located in the same shared cell as the first PLMN;

The selecting module is further configured to select one PLMN from the second set of PLMNs for registration if the second set of PLMNs is found. The device according to claim 8 or 9, wherein the device further comprises: a searching module, configured to search for an available PLMN before the mobile terminal MS registers with the first public land mobile network PLMN;

And a storage module, configured to save the shared information of the PLMN when searching for a PLMN located in the shared cell, where the shared information includes at least: a mapping relationship between the PLMN and a shared cell to which the PLMN belongs.